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Pumping of Vibrational Excitations in the Coulomb-blockade Regime in a Suspended Carbon Nanotube

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Hüttel, Andreas K. ; Witkamp, Benoit ; Leijnse, Martin ; Wegewijs, Maarten R. ; van der Zant, Herre S. J.
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Date of publication of this fulltext: 05 Aug 2009 13:58


Low-temperature transport spectroscopy measurements on a suspended few-hole carbon nanotube quantum dot are presented, showing a gate-dependent harmonic excitation spectrum which, strikingly, occurs in the Coulomb-blockade regime. The quantized excitation energy corresponds to the scale expected for longitudinal vibrations of the nanotube. The electronic transport processes are identified as ...


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